4-Hydroxythiobenzamide, also known as p-hydroxythiobenzamide, is an off-white to light yellow solid powder at room temperature. It contains a thiocarboxamide group (-C(=S)-NH₂) and a phenolic hydroxyl group (-OH), with good stability, and is mainly used as a pharmaceutical intermediate.

1. Core application: Key intermediate for Febuxostat (used in the synthesis of anti-gout drugs).

2. Organic synthesis: Building block for thioamides, raw material for heterocyclic synthesis.

3. Pharmaceutical & chemical industry: Drug molecule modification, synthesis of sulfur-containing compounds